Modelling of Algal Growth in a Reservoir with Considering the Water Flow Dynamics and its Application for Prevention of Algal-Bloom

Abstract

The algal growth in the Tsukui Reservoir, one of the typical eutrophicated reservoir in Japan, was modeled numerically with considering the water flow dynamics in the reservoir. After evaluating the predictability of the model, we simulate the operation of the in situ algal filtration method. The results suggested that there are non-linear relationships between the filtration rate and algal growth, or material recovery. The optimum operation condition of the in situ algal filtration method which removes 50% of algae in the Tsukui Reservoir was calculated as 10⁶ · m³ · day^-1∼10⁷m³ · day^-1.